ATmega329 Atmel Corporation, ATmega329 Datasheet - Page 240

• Manufacturer Part Number: ATmega329
• Manufacturer: Atmel Corporation

Specifications of ATmega329

• Flash (kbytes): 32 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 17
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Segment Lcd: 100
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

240
ATmega329/3290/649/6490
• Bit 7 – LCDCS: LCD Clock Select
When this bit is written to zero, the system clock is used. When this bit is written to one, the
external asynchronous clock source is used. The asynchronous clock source is either
Timer/Counter Oscillator or external clock, depending on EXCLK in ASSR. See
Operation of Timer/Counter2” on page 151
• Bit 6 – LCD2B: LCD 1/2 Bias Select
When this bit is written to zero, 1/3 bias is used. When this bit is written to one, ½ bias is used.
Refer to the LCD Manufacture for recommended bias selection.
• Bit 5:4 – LCDMUX1:0: LCD Mux Select
The LCDMUX1:0 bits determine the duty cycle. Common pins that are not used are ordinary port
pins. The different duty selections are shown in
Table 23-2.
Note:
• Bits 3:0 – LCDPM3:0: LCD Port Mask
The LCDPM3:0 bits determine the number of port pins to be used as segment drivers. The dif-
ferent selections are shown in
Table 23-3.
LCDPM3
LCDMUX1
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
1
1
1. 1/2 bias when LCD2B is written to one and 1/3 otherwise.
LCDPM2
LCD Duty Select
LCDMUX0
LCD Port Mask (Values in bold are only available in ATmega3290/6490)
0
0
0
0
1
1
1
1
0
0
0
0
1
0
1
0
1
LCDPM1
0
0
1
1
0
0
1
1
0
0
1
1
0
Static
Duty
Table
1/2
1/3
1/4
LCDPM0
23-3. Unused pins can be used as ordinary port pins.
0
1
0
1
0
1
0
1
0
1
0
1
0
1/2 or 1/3
1/2 or 1/3
1/2 or 1/3
for further details.
Static
Bias
I/O Port in Use as
Table
Segment Driver
(1)
(1)
(1)
SEG0:12
SEG0:14
SEG0:16
SEG0:18
SEG0:20
SEG0:22
SEG0:23
SEG0:24
SEG0:26
SEG0:28
SEG0:30
SEG0:32
SEG0:34
23-2.
COM Pin
COM0:1
COM0:2
COM0:3
COM0
Maximum Number
of Segments
I/O Port Pin
COM1:3
COM2:3
COM3
None
13
15
17
19
21
23
24
25
27
29
31
33
35
“Asynchronous
2552K–AVR–04/11